Showing results for 
Search instead for 
Did you mean: 
NEW Connect to DBS IDEAL direct bank feeds Click here
Level 1


Good day


We are in the process of migrating but our Desktop version has got an error code of C = 343 which is blocking our last backup and we cannot access files


Anyway someone might be able to assist with this


2 Comments 2
Level 11


Can you open the sample file on your QB Desktop?

Which QB Desktop year version?

QuickBooks Team


We appreciate your time in reaching out to us. Allow me to help you resolve the error so you can proceed in moving to QBO, eloizemellet.


Error C=343 in QuickBooks Desktop is often caused by a missing or corrupted MSXML.dll file or compatibility issues between your Windows and QuickBooks versions. Here are some troubleshooting steps to fix this error:


  • Reinstall or update the MSXML DLL files on your system. QuickBooks requires specific versions to run properly. Here's an article as a guide: Repair Microsoft MSXML.
  • Make sure you have installed all the latest Windows updates, especially any .NET Framework updates. This helps with QuickBooks compatibility.
  • Try running QuickBooks in Selective Startup mode to disable other startup programs that may be interfering.
  • Reinstall QuickBooks Desktop on the computer and update to the latest release and patches.
  • Try creating a new Windows user profile and open QuickBooks with that to rule out corrupted user files.


I would also recommend seeking assistance from your IT person as the majority of the troubleshooting steps involved working with your computer OS components and settings.


 Feel free to check out these articles for additional guidance and resources when migrating data to QBO:



You may have noticed that these articles fall under the USA Community banner. However, please rest assured that the steps outlined apply to all Desktop versions in all regions.


Don't hesitate to reach out to us again if you require further assistance during your transition to QuickBooks Online, eloizemellet. We are always here to offer our support whenever you need it.